<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
        <div id="app">
           <cpn></cpn>
           <cpn></cpn>
           <cpn></cpn>
           <cpn></cpn>
        </div>
        <template id="cpn">
            <div>
                <h2>我是组件</h2>
                <p>我是组件，哈哈哈</p>
            </div>
        </template>
        <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
        <script>
            const app=new Vue({
                el:'#app',
                data:{
                    message:'vuejs'
                },components: { 
                    cpn:{
                        template:'#cpn'
                    }
                 },
            })
        </script>
</body>
</html>